Christian Bale 'Vice' interview2:29

December 21, 2018. Supplied video obtained Friday, December 21, 2018, of Christian Bale, who plays Dick Cheney in the soon to be released film 'Vice', speaking with AAP journalist Peter Mitchell in Los Angeles. Bale describes his character (Dick Cheney) as "hardcore" and "certainly not somebody who waivers". "The man has absolute assurance," he said. "He can be reassuring to other people, he has absolute assurance in his own beliefs and no regrets whatsoever." Vice opens in Australian cinemas on Boxing Day. (AAP VIDEO/Peter Mitchell)

He had previously gone through extreme weight gain for American Hustle and The Big Short, slimmed down to less than 56 kilos for The Machinist and bulked up to play Batman in the Dark Knight trilogy of films.

Bale said: “By this time I’m 20lb (nine kilos) in. I said, ‘Wait — none?’ I felt like such a t*t, but I thought: I’m on this road; I’m going to keep going.”

Bale as BatmanSource:Supplied

Christian Bale in The MachinistSource:Supplied

He added that he feels sorry for his wife, the model Sibi Blazic, who has to put up with his changes, saying: “No matter what happens, my wife’s seen it,” but said his new look found a fan in his son Joseph, four.

He said: “My son loved the tummy. He would just bounce up and down on that a lot and headbutt it and bounce off it and fall to the floor.”

Asked if he would play other politicians, such as Boris Johnson, he said his wife would veto the role

“She’d say: ‘No, we’re not having that one. He’s not coming in the house.’”

This story first appeared on The Sun and has been republished here with permission.